662321128768 has 112 divisors (see below), whose sum is σ = 1483121687040. Its totient is φ = 291170525184.

The previous prime is 662321128759. The next prime is 662321128771. The reversal of 662321128768 is 867821123266.

It is a super-2 number, since 2×662321128768² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4501096 + ... + 4645912.

It is an arithmetic number, because the mean of its divisors is an integer number (13242157920).

Almost surely, 2^662321128768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662321128768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741560843520).

662321128768 is an abundant number, since it is smaller than the sum of its proper divisors (820800558272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

662321128768 is a wasteful number, since it uses less digits than its factorization.

662321128768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145104 (or 145094 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The spelling of 662321128768 in words is "six hundred sixty-two billion, three hundred twenty-one million, one hundred twenty-eight thousand, seven hundred sixty-eight".